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 Post subject: fans with the highest static pressure
PostPosted: Tue Mar 15, 2011 1:20 am 
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hi i am new on this site, found this page when I searched for a 120mm computer fans,
so i hope you can help me :)

im looking for the fan with the highest static pressure,


it should be under 25 dba preferrably less
and move at least 28 cfm



i've have looked at some like these:

Silverstone AP121 Air Penetrator - 120mm
Noctua NF-P12-1300 - 120mm
Scythe Gentle Typhoon 120mm - 1150 rpm

is any of these a good choice or is there a better choice?


regards nucc


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 Post subject: Re: fans with the highest static pressure
PostPosted: Tue Mar 15, 2011 5:58 am 
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nucc wrote:
is any of these a good choice or is there a better choice?

I guess it isn't (so) simple: do you want the highest pressure at a given flow, or at a given noise level?
Moreover 25dB is a rather high noise level, while 28CFM is a moderately low flow level.

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 Post subject: Re: fans with the highest static pressure
PostPosted: Tue Mar 15, 2011 9:07 am 
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nucc wrote:
hi i am new on this site, found this page when I searched for a 120mm computer fans,
im looking for the fan with the highest static pressure, it should be under 25 dba preferrably less
and move at least 28 cfm

i've have looked at some like these:
Silverstone AP121 Air Penetrator - 120mm
Noctua NF-P12-1300 - 120mm
Scythe Gentle Typhoon 120mm - 1150 rpm

is any of these a good choice or is there a better choice?
Those are probably not dab choices. Dorothy Bradbury used to sell some ball bearing 120mm NMB panaflow fans that generated more static pressure at the low sound levels. Seems like she is out of that business. But I think you can still get sleeve bearing versions.

I would select the 1900 rpm Scythe Gentle Typhoon and downvolt it until you get what you are looking for. I think you can downvolt it to under 800 rpm and it is the same blade. If you look at the blade you can see that it is designed to handle high static pressure in a way that the other two fans are not. The downside is that it takes more RPMs for the Gentle Typhoon to generate the same free air CFMs as the other fans.

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 Post subject: Re: fans with the highest static pressure
PostPosted: Tue Mar 15, 2011 5:12 pm 
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38mm thick fans can push more air into static pressure than 25mm thick fans. Static pressure means more noise.

What is your specific situation? What is your system, and where will these fans be used?

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 Post subject: Re: fans with the highest static pressure
PostPosted: Tue Mar 15, 2011 8:55 pm 
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NeilBlanchard wrote:
38mm thick fans can push more air into static pressure than 25mm thick fans. Static pressure means more noise.
How about these:
Triebwerk TK-121
http://www.xbitlabs.com/articles/cooler ... html#sect0

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 Post subject: Re: fans with the highest static pressure
PostPosted: Tue Mar 15, 2011 10:15 pm 
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ces wrote:
How about these

AFAIK they are clearly inferior to the classic Gentle Typhoon.

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 Post subject: Re: fans with the highest static pressure
PostPosted: Wed Mar 16, 2011 4:41 am 
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im gonna jump in here and back the GTs as well. not sure i'd get the high rpm one, but rather something like the 1450rpm one(the 1150 might work fine). you can go onto any forum with a bunch of watercoolers, and they'll point you to the gt for static pressure.

the silverstone ap is just a fan with a straightener on it, when it hits something, the flow breaks up like any other fan. its more for blowing air across a case than for blowing through a high back pressure situation.

the GT on the other hand will blow less air in free space, but they really dont lose their strength when strapped to a heatsink or a radiator; thats where their strength lies.

if we could, is there more specific information on what the fans will be doing?

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 Post subject: Re: fans with the highest static pressure
PostPosted: Wed Mar 16, 2011 12:07 pm 
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quest_for_silence wrote:
ces wrote:
How about these

AFAIK they are clearly inferior to the classic Gentle Typhoon.
Agreed

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 Post subject: Re: fans with the highest static pressure
PostPosted: Wed Mar 16, 2011 6:13 pm 
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30-39dBA is darn loud.

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 Post subject: Re: fans with the highest static pressure
PostPosted: Wed Mar 16, 2011 6:34 pm 
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NeilBlanchard wrote:
30-39dBA is darn loud.
Its all relative. An SPCR dB isn't the same as an Xbits dB.

At 500 rpm the Triebwerk generates 9.3 Xbits CFM at 30.1 Xbits dB
http://www.xbitlabs.com/articles/cooler ... html#sect0

At 600 rpm the Nexus generates 9.2 Xbits CFM at 30.4 Xbits dB
http://www.xbitlabs.com/articles/cooler ... html#sect0

I believe that these are fee airflow numbers, the relative numbers would no doubt be different with higher static pressure.

That is the problem with fan reviews. They are only good within the test. And the test may or may not duplicate your environment. In fact you can rest assured that no test, including SPCR tests, duplicates your environment.

It would be so helpful if all reviews gave results in
1. free air,
2. slightly high static pressure and
3. real high static pressure.

It would make it much easier to extrapolate the testing results to your particular application or need.

I am unaware of any fan reviewer who does this. Xbits after testing the fan, admits that it has no clue about its static pressure performance: ""Hopefully, this fan has no rivals in terms of static pressure."

They tested it and they admit they are still clueless about its static pressure performance.

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 Post subject: Re: fans with the highest static pressure
PostPosted: Wed Mar 16, 2011 10:38 pm 
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Nice to see that the OP seem very interested into this thread, however...

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 Post subject: Re: fans with the highest static pressure
PostPosted: Mon Mar 21, 2011 3:20 am 
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hi all, and thanks for all your answers :)

i prefer high static pressure with a low noise level,
over a high airflow, (as long as it don't get below 28cfm)

i can see that most of you recommend, the Scythe Gentle Typhoon 120mm - 1150 rpm
over the Noctua NF-P12-1300 - 120mm
so i think i will go with that, if that's the better choice,
even though the spec. is lower..


thanks a lot everybody :)




"Nice to see that the OP seem very interested into this thread, however..."
if that was entitled to me, then i'm sorry, i cant be on the web every day :?




an on a side note, thanks fumino i'll defently get a Silverstone AP121
to blow inside the cabinet. thanks!


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 Post subject: Re: fans with the highest static pressure
PostPosted: Fri May 06, 2011 12:51 am 
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Joined: Fri May 06, 2011 12:44 am
Posts: 1
ces wrote:
nucc wrote:
hi i am new on this site, found this page when I searched for a 120mm computer fans,
im looking for the fan with the highest static pressure, it should be under 25 dba preferrably less
and move at least 28 cfm

i've have looked at some like these:
Silverstone AP121 Air Penetrator - 120mm
Noctua NF-P12-1300 - 120mm
Scythe Gentle Typhoon 120mm - 1150 rpm

is any of these a good choice or is there a better choice?
Those are probably not dab choices. Dorothy Bradbury used to sell some ball bearing 120mm NMB panaflow fans that generated more static pressure at the low sound levels. Seems like she is out of that business. But I think you can still get sleeve bearing versions.

I would select the 1900 rpm Scythe Gentle Typhoon and downvolt it until you get what you are looking for. I think you can downvolt it to under 800 rpm and it is the same blade. If you look at the blade you can see that it is designed to handle high static pressure in a way that the other two fans are not. The downside is that it takes more RPMs for the Gentle Typhoon to generate the same free air CFMs as the other fans.


I also think so.

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